Help for tagging (search) added.

pages/help.py

 SEARCH = mycreole.render_simple(_(
     """
 = Search
-The search looks up full words in //title (page basename)// and //page_src (the creole source)// without giving \
-special search commands in the search string.
+The search looks up full words in //title (page basename)//, //page_src (the creole source)// and //tag (page tags)// \
+without giving special search commands in the search string.
 
 === Search fields
 * title (TEXT)
 * page_src (TEXT)
+* tag (TEXT)
 * creation_time (DATETIME)
 * modified_time (DATETIME)
 * modified_user (TEXT)
 == Examples
 * [[/search/?q=modified_user:system-page|modified_user:system-page]] results in a list of all system pages.
 * [[/search/?q=modified_time%3A%5B-5d+to+now%5D| modified_time:[-5d to now] ]] results in a list of all pages which have been modified within the last 5 days.
+* [[/search/?q=tag%3Afoo| tag:foo ]] results in a list of all pages which are tagged with //foo//.
 """))
 
 BACKUP = mycreole.render_simple(_(

pages/search.py

     # Page
     title=TEXT,
     page_src=TEXT,
-    page_tags=TEXT,
+    tag=TEXT,
     # metadata
     creation_time=DATETIME,
     modified_time=DATETIME,
         #
         title=bp.title,
         page_src=bp.raw_page_src,
-        page_tags=bp.page_tags,
+        tag=bp.page_tags,
         #
         creation_time=datetime.fromtimestamp(bp._meta_data.get(bp._meta_data.KEY_CREATION_TIME)),
         modified_time=datetime.fromtimestamp(bp._meta_data.get(bp._meta_data.KEY_MODIFIED_TIME)),
 
 def whoosh_search(search_txt):
     ix = load_index()
-    qp = qparser.MultifieldParser(['title', 'page_src', 'page_tags'], ix.schema)
+    qp = qparser.MultifieldParser(['title', 'page_src', 'tag'], ix.schema)
     qp.add_plugin(DateParserPlugin(free=True))
     try:
         q = qp.parse(search_txt)